It wouldn't be a stretcht to say that the 'Keitt' is the king of mangoes, large fruit production, plenty of flesh, thin seed, almost fiberless, and an excellent tree. The only way that the 'Keitt' would be knocked off its perch, is if an 'Edward' like mango, with the same qualities as the 'Keitt' appeared.
By the way, congratulations, you have those 'Keitt' eating squirrels under total control/domination.